Automatic stop record



July 31, 1923' 1,463,235

J w WHALEN v AUTOMATIC S '1OP RECORD Filed Jah. 31 1922 I w 1 0 Q 0 Patented July 31, 1923.

JAMES W. \VHAL EN, OF RICHMOND, INDIANA AUTOMATIC s'ror nnoonn.

Application. filed January 31, 1922. Serial No. 532,935.

To all whom it may concern:

Be it known that 1, JAMES W. lVrriiLn v, a citizen of the United States, residing in the city of Richmond, in the county of lVayne, State of Indiana, have invented new and useful Improvements in an Automatic Stop Record for Phonographs, of which the following is a full, clear, and accurate specification and exposition. I

The object of my present invention, boardly speaking, is to provide improvements in phonograph records or discs by which each record-disc will be provided with self-contained means whereby immediately upon the completion of the reproduction of the recorded matter the phonograph mechanism will automatically stop, said means being simple in character, effective in practice, requiring no thought on the part of the attendant for its installation, attention, or

control; the same being practically incon s oicuous in appearance, will not become inoperative by usage, and the production and installation cost of which will be practically nil. I

Other minor objects and: particular advantages of the invention will suggest themselves in the course of the following description and that which is new will be correlated in the appended claims.

The preferred means for carrying out the principles of my invention in a practical manner is shown in the accompanying drawings, in which-Figure 1 is a plan view of one side of a record disc, the same being taken on areduced scale from actual size, and showing my invention in connection therewith. T

Figure 2 is a cross section of a portion of a record disc, and of the needle operative therewith, the same being taken on a greatly enlarged scale from actual size, and showing my invention.

Figure3showsa portion of a record disc, and a portion of a needle, and showing my invention, all on a scale still further enlarged from that of Fig. 2. And Figure 4 is similar to Figure 2 but showing a slight modification thereover.

Similar indices denote like parts throughout the several views.

In order that the construction and the advantages of my invention may be more fully understood and appreciated I will now take up a detailed description thereof in which I will set forth the invention as fully and clearly asl'may.

Referring now to the drawings in detail: Letter A denotes thebody of a record disc,

the same having a central. aperture B, and

the peripheral edge C. Letter D denotes the label, which is concentric of the aperture 13, and it is located on or imbedded into the sur-. face of the body in 'the usual manner.

T Letter E. denotes the spiral impression line, which infect is a single groove, comthe letter there is formed into the face of the record disc a comparatively large V shaped channel F, every point of which is equidistant from the center, that is to say, it is concentric with the aperture B, and it is a single endless channel and it is of the same size throughout.

Letter G'denotes the reproducing needle or. stylus whoselower end terminates 1n a point. which point travels in the recorded line F in the usual manner whereby the recorded'matter on the disc is reproduced in the usual manner. v

It is of couse now apparent that a record disc'having a channel F formed at the inner terminal of the recorded matter-is the main feature of this present invention.

In practice the shape of the channel different from that of the lower portion of the needle, that is it is formed with a more acute angle than that of the lower portion of the needle, wherebyv if-the lower portion of the needle be entered in the channel Fthen the shoulder formed by the upper end portion of the channel F will be the point with which the needle engages.

reason of the shape of the channel F 'with relation to the lower portion of the 00' Fis be that the needle will wedge into said channel 4*, thereby acting as a brake which very soon brings the disc record to absolute rest or stationary condition, thereby accomplishing the desideratuni of this present invention.

Spiral impressions E are usually formed on both sides of the disc, as indicated in Figs. 2 and 4, but the inner terminals thereof scarcely ever come opposite to each other, therefore the record disc will not be weal;- ened materially thereby, as is apparent in the drawings.

In some instance there is, or may be, an insert into one or both races of the record disc, as tne inserts H and I, l, said inserts being of a different material from that of the bod of the record disc, and it pr-opose in some instances to form the channel F at the surface juncture of the material H with the body A, whereby the channel i will be half in one material half in the other material, in which instance the material H should be such as to provide greater frictional contact with the needle than would otherwise be if the channel were all formed in the material of the body A.

l have found by actual tests that when a phonograph is operated in the usual 1minner that the needle G will travel centerward in the usual manner until at the end oi the recorded portion E of the disc the point of the needle will drop into tie channel l1" as soon as it leaves the spiral groove E, after which the entire mechanism of the phonegraph will slow down and finally stop within one or two revolution oi the disc or record.

I desire that it be understood that Various changes may be made in the several details of construction herein shown without leparting from the spirit of the invent-ion and without sacrificing any oi the advantages thereof which are new and useful.

Having now fully shown and described my invention, what ll claim and desire to secure by Letters Patent oi the United States is 1 A phonograph record disc having a spiral impression in its face in the usual manner and having a Vshaped channel formed at the inner terminus of said sp' 'al impression, said channel being form d in the face of the disc and concentric therewith and being" larger in cross section than the spiral impression, the walls of said channel being; at more acut angle with r i or to each other than is the angle of the lower portion of the stylus, whereby the stylus will engage the walls of the channel only at the surface of the disc with the point 0. the suspended in said channel, all substantially as shown and described A phonograph record disc having a sniral impression in its face, an insert in the the disc, said insert being of ma dii'fcrent iiiOln the material ot the te'iial main ortion or the disc, said insert being; flush with the race of the disc and extend ing centerward from the inner terminus of the spiral impression, there being t shaped channel formed the unr-ture c phery or the insert with the boo so, substantially as set forth.

phonograph record disc, the lace ot the disc being formed by two kinds of ina-- terial which meet upon a line concen with the disc, there bein a V-shaped channel formed in the race or the disc with one portion or said channel formed in one ma terial and the other portion in the cthau' material of which the disc is composed, all substantially as shown and described.

JAMES 3 WHALEN. 

